Toy building brick



FIG. 1 is a top isometric view of a toy building brick showing my new design;

FIG. 2 is a bottom isometric view of the toy building brick;

FIG. 3 is a right side view of the toy building brick, a left side view being a mirror image thereof;

FIG. 4 is a top view of the toy building brick;

FIG. 5 is a bottom view of the toy building brick;

FIG. 6 is a cross-sectional view of the toy building brick taken along line 6-6 of FIG. 3; and,

FIG. 7 is a cross-sectional view of the toy building brick taken along line 7-7 of FIG. 3. 

CLAIM The ornamental design for a toy building brick, as shown and described. 